Before we get to the contact details please note the following important details:
Messages that aim to sell me goods or services will be deleted without comment, unless my interest was explicitly expressed in advance
Contact that go in the direction of “pen pal” will also be deleted without comment
Basically, I appreciate it very much not to be disturbed because of trivialities
If the message sent to me does not fall into the above categories, an answer from me is very likely
If you want/need to drop me an email you can address your mail to hi [at] hmbrg [dot] org.